10401603 - Tweco Classic No. 4 MIG Gun, 400A, 15ft, Euro Connection, .035-.045 Wire

The Industry Standard for Heavy-Duty Welding

The Tweco Classic No. 4 MIG Gun is an icon in the welding world, representing the gold standard for durability, reliability, and performance in heavy industrial applications. For decades, professional fabricators have relied on the "Classic" series to deliver consistent results in the toughest environments. This specific model (10401603) is configured with a Euro back-end connection, making it compatible with a vast array of modern welding machines that utilize this universal standard, including equipment from Esab, Miller, Lincoln (with adapters), and many European brands.

Rated at a robust 400 Amps at 60% duty cycle (using CO2 gas), the Classic No. 4 is built to handle high-amperage welding for extended periods. Whether you are welding structural steel, heavy machinery, or performing shipyard repairs, this gun provides the thermal capacity needed to prevent overheating. The 15-foot cable assembly offers a generous working radius, allowing welders to move around large assemblies without constantly repositioning the wire feeder.

Designed for the Professional

One of the key advantages of the Tweco Classic series is its serviceability. The gun is designed to be easily repaired in the field, with a simple construction that allows for quick replacement of triggers, conductor tubes, and cable liners. It comes pre-setup for .035" to .045" (0.9mm - 1.2mm) wire, covering the most common range for industrial fabrication. The metal-jacketed conductor tube and heavy-duty cable outer jacket resist cuts, burns, and abrasion, ensuring a long service life even in abusive shop conditions.

By choosing the Tweco Classic No. 4, you are investing in a tool that is supported by the most widely available consumables in the industry. The 14-series contact tips and 24-series nozzles are stocked by virtually every welding supplier, ensuring that keeping your gun operational is never a hassle.